Method and system for performing charging processing on network slice customer, and related device

A system for performing charging processing on a network slice customer, comprising:

• a session management device, a network slice charging gateway, and a network slice customer charging device, wherein
• the session management device is configured to:
• send a first charging request message to the network slice charging gateway, wherein the first charging request message comprises session information, and the session information comprises an attribute of a protocol data unit (PDU) session of a user equipment on a network slice instance;
• the network slice charging gateway is configured to:
• receive the first charging request message from the session management device;
• determine, based on the first charging request message, that charging processing is to be performed on a target network slice customer for the PDU session, wherein the determining that charging process is to be performed on the target network slice customer comprises determining an identifier of the target network slice customer based on the first charging request message;
• and
• send a second charging request message to the network slice customer charging device, wherein the second charging request message comprises the identifier of the target network slice customer and the session information;
• and
• the network slice customer charging device is configured to:
• receive the second charging request message from the network slice charging gateway;
• and
• perform charging processing on the target network slice customer for the PDU session based on the second charging request message.